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"Onyudo" Wadatsumi (大入道ワダツミ Ōnyūdō Wadatsumi) is a giant tiger blowfish fishman and a member of the Flying Pirates under captain Vander Decken IX. <br /> <br /> "Onyudo" (大入道 Ōnyūdō), Wadatsumi's nickname, literally means "large, bald-headed monster" or "giant". "Umibōzu", which is what Usopp incorrectly refers Wadatsumi as, means "sea bonze", a Japanese mythological spirit. Wadatsumi's name itself is derived from "Watatsumi", the name of the Japanese sea god and dragon of Shinto religion. <br /> <br /> First Appearance: Chapter 606; Episode 525 <br /> <br /> (Source: One Piece Wikia) <br /><br />